The Battery Tender Solar Controller prevents under and overcharging of batteries. A charge controller regulates the voltage and current coming from the solar panel into the battery. Solar panels for 12 volt batteries put out more volts than that to compensate for times when weather conditions are not ideal for consistent charging. The Battery Tender Solar Controller keeps the excess voltage from damaging the battery.

Use the Battery Tender Solar Controller with an existing solar panel. The solar panel is not included.

Battery Tender's Super Smart Charging Algorithm gives the battery just the right amount of voltage to keep it charged and maintained.